1. If you keep your phone vertically, tap on the 3 dots on the top right hand corner. Choose "Like" from drop-down menu.
2. If you keep your phone horizontally, tap on the heart icon. The icon will change to white when your like is registered.
If the publication is already open and you do not see the menu bar, tap anywhere on the screen, and the menu bar will appear. Then follow the instructions provided above.
If you only scroll through the covers of several magazines, you will see the heart icon even though you keep your phone vertically.